I've been getting console messges like this:

Jan 25 22:31:27 sy-borg /netbsd: asc_get_status: cmdreg 11, fifo cnt 7
Jan 25 22:31:27 sy-borg /netbsd: rz0: Illegal request

and some userland messages like:
cpp: xbm/align_b.xbm: Input/output error


Its a DECstation 5000/200

dmesg sez:

NetBSD 1.3.3 (GENERIC) #0: Sat Dec 12 15:08:02 EST 1998
    root@vlad:/usr/src/sys/arch/pmax/compile/GENERIC
real mem = 41943040
avail mem = 34828288
using 1024 buffers containing 4194304 bytes of memory
mainbus0 (root)
cpu0 at mainbus0: MIPS R3000 CPU Rev. 2.0 with MIPS R3010 FPC Rev. 3.0
        L1 cache: 64kb Instruction, 64kb Data.
tc0 at mainbus0: 25 MHz clock
(configuring KN02 system slot as asic)
asic0 at tc0 slot 7 offset 0x0
dc0 at asic0 offset 0x200000 priority 7address 0x0xbfe00000

clock0 at asic0 offset 0x280000 priority 0: mc146818 or compatible
le0 at tc0 slot 6 offset 0x0: address 08:00:2b:1b:c1:24
le0: 32 receive buffers, 8 transmit buffers
asc0 at tc0 slot 5 offset 0x0 (bus speed: 25 MHz) : target 7
le1 at tc0 slot 1 offset 0x0: address 08:00:2b:1a:80:19
le1: 32 receive buffers, 8 transmit buffers
sfb0 at tc0 slot 0 offset 0x0 (1280x1024x8) (console)
Beginning old-style SCSI device autoconfiguration
rz0 at asc0 drive 0 slave 0 DEC RZ56     (C) DEC rev 0300
rz0: 634MB, 1632 cyl, 15 head, 53 sec, 512 bytes/sect x 1299174 sectors
tz0 at asc0 drive 5 slave 0 ARCHIVE IBM4326NP/RP  !D rev 4BKA
boot device: rz0
root on rz0a dumps on rz0b
root file system type: ffs
asc_get_status: cmdreg 11, fifo cnt 7
rz0: Illegal request